کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4424934 1309090 2010 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Soil sterilization affects aging-related sequestration and bioavailability of p,p′-DDE and anthracene to earthworms
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
پیش نمایش صفحه اول مقاله
Soil sterilization affects aging-related sequestration and bioavailability of p,p′-DDE and anthracene to earthworms
چکیده انگلیسی

Laboratory experiments investigated the effects of soil sterilization and compound aging on the bioaccumulation of spiked p,p′-DDE and anthracene by Eisenia fetida and Lumbricus terrestris. Declines in bioavailability occurred as pollutant residence time in both sterile and non-sterile soils increased from 3 to 203 d. Accumulation was generally higher in sterile soils during initial periods of aging (from 3–103 d). By 203 d, however, bioavailability of the compounds was unaffected by sterilization. Gamma irradiation and autoclaving may have altered bioavailability by inducing changes in the chemistry of soil organic matter (SOM). The results support a dual-mode partitioning sorption model in which the SOM components associated with short-term sorption (the ‘soft’ or ‘rubbery’ phases) are more affected than are the components associated with long-term sorption (the ‘glassy’ or microcrystalline phases). Risk assessments based on data from experiments in which sterile soil was used could overestimate exposure and bioaccumulation of pollutants.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Environmental Pollution - Volume 158, Issue 10, October 2010, Pages 3285–3289
نویسندگان
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